Have had my civic for a couple of years, only put around 10k on it a year until my new job, now I am putting 1k on it a week minimum,after the first month, my trans kicked the bucket, got a new one. Not soon after that I started have coolant problems, it was leaking, and unable to afford to replace anything I would just fill it up as it started to get hot. After a few months of this I finally was able to get it checked out ajd got a new readiator put in it, as the guy I took it to said it had a few hairline cracks in it. Problem was still not fixed, took it another shop a few weeks later, they ran some tests and said it was just a loose hose clamp, they fixed it, and I had them flush the system as well just in case.

It is still leaking, and am running out of ideas, they ran a pressure test when they discovered the loose clamp, and found nothing else, my only theroy is there is a leak that only appears while the engine is warm, it can go for about 4-5 hours depending on how I am running it before it will startto over heat, and i have to pull over and fill it back up. If you guys have any ideas as to what it may be it would be a great help, thanks.

 

As with many 01-05's, you probably have headgasket issues. Here's a thread dedicated to these sorts of problems: https://honda-tech.com/honda-civic-2...e-etc-2889523/